(19)
(11) EP 0 479 773 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.07.1992 Bulletin 1992/27

(43) Date of publication A2:
08.04.1992 Bulletin 1992/15

(21) Application number: 92100683.9

(22) Date of filing: 14.02.1990
(51) International Patent Classification (IPC)5: F01L 1/26, F01L 1/04, F02F 1/42
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 14.02.1989 JP 32587/89
14.02.1989 JP 32588/89
14.02.1989 JP 32589/89
31.03.1989 JP 78302/89

(62) Application number of the earlier application in accordance with Art. 76 EPC:
90102890.2 / 0383297

(71) Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
Iwata-shi Shizuoka-ken, 438 (JP)

(72) Inventor:
  • Onodera, Hiroaki, c/o Yamaha Hatsudoki K. K.
    Shizuoka-ken, 438 (JP)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
80538 München
80538 München (DE)


(56) References cited: : 
   
     
    Remarks:
    This application was filed on 16 - 01 - 1992 as a divisional application to the application mentioned under INID code 60.
     


    (54) Valve train arrangement for multiple valve engine


    (57) A valve train arrangement for an internal combustion engine comprising a cylinder defining a bore (32) for receiving a piston, a cylinder head affixed relative to said cylinder and having a surface defining with said bore and the piston a combustion chamber, a pair of poppet valves (37,38) supported for reciprocation relative to said cylinder head about axes that are disposed non parallel to each other, one of said axes being inclined at an acute angle only to a first plane containing the axis of said bore, the other of said axes being inclined at an acute angle to said first plane and also at an acute angle to a second plane perpendicular to said first plane and passing through said bore axis, and a camshaft (55) supported for rotation about an axis parallel to said first plane, a first cam lobe (57) on said camshaft for operating said first valve, and a second cam lobe (56) on said camshaft for operating said second valve, said second cam lobe (56) having its cam surface extending in a direction inclined to the axis of rotation of said camshaft.






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